Chain.



A.F.HARLAN. CHAIN.

APPLICATION FILED, OGTL'QE, 1909.

1,087,001 Patented Aug. 27, 1912.

entrain snares PATENT opt on;

ASHLANF. I-IA'RLAN, CFWASHINGTON, nrsrnior or COLUMBIA, AssIGNoJa To L;n.

- snow, or WASHINGTON, DISTRICT or COLUMBIA.

oHAIN.

Specification of Letters Patent. Patented Aug. 27, 1912.

Application filed (ictober 25, 1909. Serial No. 524,502.

To all whom it may concern Be it known that I, AsHLAN F. HARLAN, a*citizen of the United States, residing in Washington, in the District ofColumbia, have invented a new and useful Improve ment in Chains, ofwhich the following is a specification. v

This. invention relates to a novel construction of chain and moreparticularly to an improved construction of chain intendedfor use 1nconnection with dredging buckets, the object of the invention beingtoprovide a strong and durablechain to which the dredging buckets can beattached and a still further object is to provide a chain in which thebearing parts can be quickly and easily removed and either reversed ornew bear-v ing parts substituted thereby enabling the links of the chainto be used indefinitely.

Heretofore, chains employed in connection with dredging buckets havebeen of such a character that when the bearing parts became appreciablyworn it. was necessary to discard the entire link and the object. of myinvention therefore is to avoid this objection by providing reversibleand removable bearing .port-ions so that the linkproper can be usedagain and again with new bearing portions. I

With these and various other objects as will appear hereinafter, myinvention consists ,of the novel features of construction,

combination .andarrangement of parts all. of which will be fullydescribed hereinafter and pointed out in the claims.

In the drawing forming part of this specification, Figure 1 is a sideelevation partlyin section, showing a part of the chain constructed inaccordance with my invention.

Fig. 2 is :1- top plan view of the same Fig.v

3 is asection on the line 3-3 of Fig. 1. Fig. 4 is an enlarged detailview of one end of one of the links to which the bucket at- 'tachingplate is connected. Fig. 5 is a detail perspective view of the bushing.

In the practical embodiment of my invention I employ a link A whichcomprises the side members B arranged parallel as shown connectedadjacent one end by means of the connecting cross-piece O and at theopposite end by means of a tongue D, said tongue projecting a shortdistance beyond the ends of the side members B and having an openmg Dproduced therein. The'opposite ends of the side members B are enlargedas shown and provide pivot ears E. One of these ears has an opening Fsufficiently large to permit the entrance of the bushing G while theother ear has an opening H large enough to receive the bolt I but not aslarge as the opening F and this opening H is preferably arranged at thecenter of a socket K produced in the inner face of the ear andcommunicating with said opening H are the notches or recesses H, thepurpose of which will appear hereinafter.

It will of course be understood that two chains are employed arrangedside by'sidc and the dredging buckets are connected thereto and for thepurpose of connect ng the said dredging buckets to the chains at theproper points I provide certain links with integral plates M having aplurality of counter-sunk apertures. M through which the adjacent boltscan be passed. These plates ,M ext-end substantially from end to end ofthe link and are madeconsiderably deeper at one' end than at the otheras shown.

In assembling the chains a sleeve L is in serted in the opening in eachtongue and then the tongue with. the" sleeve therein is inserted withinthe ears. The bushing G is then inserted being passed through theopening F and the lugs or bosses G enter the notches or recesses H ofthe socket K and the bolt I is then passed through the bore G of thebushing and anut I screwed upon the threaded end thereof, a washer Ibeing preferably arranged beneath the head of the bolt for the purposeof protecting the opening H against the entrance of dirt. When the partsare assembled as justdescribed it is obvious that the links in passingover the sprocket will turn upon the sleeve Land bushing G and all. ofthe wear or trio? tion will be exerted upon these points, and as thebushing is held stationary it will become worn upon one side and thesleeve will of course become worn upon one side also, but as soon asthese parts become worn suiticiently to need repair the sleeve can bereversed and the bushing G can also be re versed and the oppositesides-of said parts presentedfor wear and when these new sur faces havebeen worn the sleeves and bushings can be removed and new bushings andpins inserted withoutdistributing the links proper.

' 'tion which resides mainly the bearing what I claim as new and desireto secure by portions and also in the integral plate to which thebuckets are attached.

Having thus fully described my invention,

' Letters Patent is 1. In a chain, a link-provided with cars, a bushinghaving lugs at one end, one of said ears having an opening adapted toreceive the bushing and the other ear-having a pin opening and notches,the latter being adapted to, receive .the lugs of the bushing,

aretaining pin passing through said bushing and through said pinopening, and a second cooperating link.

2. The combination with links, one of which is provided with ears andthe other of which has a tongue adapted to extend betwenvsaid ears, oneof-said ears having a circular opening and the other ear being 'providedwith a hole having radial notches, a bushing adapted to-pass freelythrough the tongue, one end of said bushing resting in the opening ofone of the ears, and theotheiend of'the bushing having lugs adapted toengage said notches, and a sleeveadapted to surround that portion of thebushing passing through the tongue. i g

' ASHLAN F. HARLAN. Witnesses:

E. B. MoBA rH, REA P. WRTGHT.

Coples'of this patent may be obtained for five cents each by addressingthe Commissioner of l'atents'.

Washington, D. 0.

